在 R package 中构建rocksdb static 库

Question

I tried to use the rocksdb inside R package. I used the following src/Makevars :

CXX_STD = CXX11

PKG_CPPFLAGS = -I./rocksdb/include/
PKG_LIBS = rocksdb/librocksdb.a -lbz2 -lz -lzstd -llz4 -lsnappy

$(SHLIB): rocksdb/librocksdb.a

rocksdb/librocksdb.a: rocksdb/Makefile
    CFLAGS="$(CFLAGS) $(CPICFLAGS)" AR="$(AR)" RANLIB="$(RANLIB)" LDFLAGS="$(LDFLAGS)" \
       $(MAKE) -d --jobs=3 --directory=rocksdb static_lib

clean:
    $(MAKE) --directory=rocksdb clean

Package installation failed with many errors (see build log below).

You could reproduce this case using Docker container:

Necessary commands:

docker run --rm -ti rocker/r-ver:latest bash

Execute in container:

apt-get update
# install system deps
apt-get install -y libgflags-dev libsnappy-dev zlib1g-dev libbz2-dev liblz4-dev libzstd-dev
apt-get install -y git-core
# install R deps
install2.r Rcpp checkmate R6 tinytest
cd /tmp
git clone https://gitlab.com/artemklevtsov/rocksdb
cd rocksdb/
git submodule init
git submodule update
R CMD INSTALL .

But I can successfully run make directly in the rocksdb source directory:

cd src/rocksdb/
make static_lib

How can I fix src/Makevars to build rocksdb during R package installation?

Links:

• build log
• rocksdb install guide
• R package source repo

Answer 1

Not a full answer but an observation (for now):

I tried to reproduce this in a docker container. The R package build failed, but also the plain build when using the same flags as used by R, but without parallel jobs and make 's debug output:

root@e8749c4bca63:/tmp/rocksdb/src# CFLAGS="-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g  -fpic" AR="ar" RANLIB="ranlib" LDFLAGS="-L/usr/local/lib" \
>    make --directory=rocksdb static_lib
[...]
  CC       util/bloom.o
  CC       util/build_version.o
util/build_version.cc:5:42: error: macro "__DATE__" might prevent reproducible builds [-Werror=date-time]
 const char* rocksdb_build_compile_date = __DATE__;
                                          ^~~~~~~~
cc1plus: all warnings being treated as errors
Makefile:2029: recipe for target 'util/build_version.o' failed
make: *** [util/build_version.o] Error 1
make: Leaving directory '/tmp/rocksdb/src/rocksdb'

So it looks as if -Wdate-time got promoted to -Werror=date-time .

Answer 2

To solve the problem we should reset MAKEFLAGS variable. So the right way to do it:

rocksdb/librocksdb.a: rocksdb/Makefile
    CFLAGS="$(CCFLAGS) $(CPICFLAGS)" MAKEFLAGS="" \
       $(MAKE) -C rocksdb DISABLE_WARNING_AS_ERROR=1 static_lib

MAKEFLAGS content:

MAKEFLAGS= -- OBJECTS=RcppExports.o\ backup.o\ checkpoint.o\ db.o\ del.o\ exists.o\ get.o\ keys.o\ list.o\ options.o\ property.o\ put.o\ size.o\ sst.o\ utils.o\ version.o\ wrap.o SHLIB=rocksdb.so SHLIB_LD=$$(SHLIB_CXX11LD) SHLIB_LDFLAGS=$$(SHLIB_CXX11LDFLAGS) CXXPICFLAGS=$$(CXX11PICFLAGS) CXXFLAGS=$$(CXX11FLAGS) CXX=$$(CXX11)\ $$(CXX11STD)